Dynamics and sources of soil organic C following afforestation of croplands with poplar in a semi-arid region in northeast China.
Identifieur interne : 002276 ( Main/Exploration ); précédent : 002275; suivant : 002277Dynamics and sources of soil organic C following afforestation of croplands with poplar in a semi-arid region in northeast China.
Auteurs : Ya-Lin Hu [République populaire de Chine] ; Li-Le Hu [République populaire de Chine] ; De-Hui Zeng [République populaire de Chine]Source :
- PloS one [ 1932-6203 ] ; 2014.
Descripteurs français
- KwdFr :
- MESH :
- analyse : Carbone.
- composition chimique : Carbone, Sol.
- croissance et développement : Populus.
- physiologie : Produits agricoles.
- Agriculture, Chine, Science forêt, Écosystème.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Carbon.
- chemical , chemistry : Carbon, Soil.
- growth & development : Populus.
- physiology : Crops, Agricultural.
- Agriculture, China, Ecosystem, Forestry.
Abstract
Afforestation of former croplands has been proposed as a promising way to mitigate rising atmospheric CO2 concentration in view of the commitment to the Kyoto Protocol. Central to this C sequestration is the dynamics of soil organic C (SOC) storage and stability with the development of afforested plantations. Our previous study showed that SOC storage was not changed after afforestation except for the 0-10 cm layer in a semi-arid region of Keerqin Sandy Lands, northeast China. In this study, soil organic C was further separated into light and heavy fractions using the density fractionation method, and their organic C concentration and (13)C signature were analyzed to investigate the turnover of old vs. new SOC in the afforested soils. Surface layer (0-10 cm) soil samples were collected from 14 paired plots of poplar (Populus × xiaozhuanica W. Y. Hsu & Liang) plantations with different stand basal areas (the sum of the cross-sectional area of all live trees in a stand), ranging from 0.2 to 32.6 m(2) ha(-1), and reference maize (Zea mays L.) croplands at the same sites as our previous study. Soil ΔC stocks (ΔC refers to the difference in SOC content between a poplar plantation and the paired cropland) in bulk soil and light fraction were positively correlated with stand basal area (R (2) = 0.48, p<0.01 and R (2) = 0.40, p = 0.02, respectively), but not for the heavy fraction. SOCcrop (SOC derived from crops) contents in the light and heavy fractions in poplar plantations were significantly lower as compared with SOC contents in croplands, but tree-derived C in bulk soil, light and heavy fraction pools increased gradually with increasing stand basal area after afforestation. Our study indicated that cropland afforestation could sequester new C derived from trees into surface mineral soil, but did not enhance the stability of SOC due to a fast turnover of SOC in this semi-arid region.
DOI: 10.1371/journal.pone.0086640
PubMed: 24466183
PubMed Central: PMC3900571
Affiliations:
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Shenyang, People's Republic of China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang</wicri:regionArea><wicri:noRegion>Shenyang</wicri:noRegion></affiliation></author><author><name sortKey="Hu, Li Le" sort="Hu, Li Le" uniqKey="Hu L" first="Li-Le" last="Hu">Li-Le Hu</name><affiliation wicri:level="3"><nlm:affiliation>Chinese Research Academy of Environmental Sciences, Beijing, People's Republic of China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Chinese Research Academy of Environmental Sciences, Beijing</wicri:regionArea><placeName><settlement type="city">Pékin</settlement></placeName></affiliation></author><author><name sortKey="Zeng, De Hui" sort="Zeng, De Hui" uniqKey="Zeng D" first="De-Hui" last="Zeng">De-Hui Zeng</name><affiliation wicri:level="1"><nlm:affiliation>State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, People's Republic of China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang</wicri:regionArea><wicri:noRegion>Shenyang</wicri:noRegion></affiliation></author></analytic><series><title level="j">PloS one</title><idno type="eISSN">1932-6203</idno><imprint><date when="2014" type="published">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Agriculture (MeSH)</term><term>Carbon (analysis)</term><term>Carbon (chemistry)</term><term>China (MeSH)</term><term>Crops, Agricultural (physiology)</term><term>Ecosystem (MeSH)</term><term>Forestry (MeSH)</term><term>Populus (growth & development)</term><term>Soil (chemistry)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Agriculture (MeSH)</term><term>Carbone (analyse)</term><term>Carbone (composition chimique)</term><term>Chine (MeSH)</term><term>Populus (croissance et développement)</term><term>Produits agricoles (physiologie)</term><term>Science forêt (MeSH)</term><term>Sol (composition chimique)</term><term>Écosystème (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Carbon</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Carbon</term><term>Soil</term></keywords><keywords scheme="MESH" qualifier="analyse" xml:lang="fr"><term>Carbone</term></keywords><keywords scheme="MESH" qualifier="composition chimique" xml:lang="fr"><term>Carbone</term><term>Sol</term></keywords><keywords scheme="MESH" qualifier="croissance et développement" xml:lang="fr"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Produits agricoles</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Crops, Agricultural</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Agriculture</term><term>China</term><term>Ecosystem</term><term>Forestry</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Agriculture</term><term>Chine</term><term>Science forêt</term><term>Écosystème</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Afforestation of former croplands has been proposed as a promising way to mitigate rising atmospheric CO2 concentration in view of the commitment to the Kyoto Protocol. Central to this C sequestration is the dynamics of soil organic C (SOC) storage and stability with the development of afforested plantations. Our previous study showed that SOC storage was not changed after afforestation except for the 0-10 cm layer in a semi-arid region of Keerqin Sandy Lands, northeast China. In this study, soil organic C was further separated into light and heavy fractions using the density fractionation method, and their organic C concentration and (13)C signature were analyzed to investigate the turnover of old vs. new SOC in the afforested soils. Surface layer (0-10 cm) soil samples were collected from 14 paired plots of poplar (Populus × xiaozhuanica W. Y. Hsu & Liang) plantations with different stand basal areas (the sum of the cross-sectional area of all live trees in a stand), ranging from 0.2 to 32.6 m(2) ha(-1), and reference maize (Zea mays L.) croplands at the same sites as our previous study. Soil ΔC stocks (ΔC refers to the difference in SOC content between a poplar plantation and the paired cropland) in bulk soil and light fraction were positively correlated with stand basal area (R (2) = 0.48, p<0.01 and R (2) = 0.40, p = 0.02, respectively), but not for the heavy fraction. SOCcrop (SOC derived from crops) contents in the light and heavy fractions in poplar plantations were significantly lower as compared with SOC contents in croplands, but tree-derived C in bulk soil, light and heavy fraction pools increased gradually with increasing stand basal area after afforestation. Our study indicated that cropland afforestation could sequester new C derived from trees into surface mineral soil, but did not enhance the stability of SOC due to a fast turnover of SOC in this semi-arid region. </div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">24466183</PMID><DateCompleted><Year>2014</Year><Month>09</Month><Day>29</Day></DateCompleted><DateRevised><Year>2018</Year><Month>11</Month><Day>13</Day></DateRevised><Article PubModel="Electronic-eCollection"><Journal><ISSN IssnType="Electronic">1932-6203</ISSN><JournalIssue CitedMedium="Internet"><Volume>9</Volume><Issue>1</Issue><PubDate><Year>2014</Year></PubDate></JournalIssue><Title>PloS one</Title><ISOAbbreviation>PLoS One</ISOAbbreviation></Journal><ArticleTitle>Dynamics and sources of soil organic C following afforestation of croplands with poplar in a semi-arid region in northeast China.</ArticleTitle><Pagination><MedlinePgn>e86640</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1371/journal.pone.0086640</ELocationID><Abstract><AbstractText>Afforestation of former croplands has been proposed as a promising way to mitigate rising atmospheric CO2 concentration in view of the commitment to the Kyoto Protocol. Central to this C sequestration is the dynamics of soil organic C (SOC) storage and stability with the development of afforested plantations. Our previous study showed that SOC storage was not changed after afforestation except for the 0-10 cm layer in a semi-arid region of Keerqin Sandy Lands, northeast China. In this study, soil organic C was further separated into light and heavy fractions using the density fractionation method, and their organic C concentration and (13)C signature were analyzed to investigate the turnover of old vs. new SOC in the afforested soils. Surface layer (0-10 cm) soil samples were collected from 14 paired plots of poplar (Populus × xiaozhuanica W. Y. Hsu & Liang) plantations with different stand basal areas (the sum of the cross-sectional area of all live trees in a stand), ranging from 0.2 to 32.6 m(2) ha(-1), and reference maize (Zea mays L.) croplands at the same sites as our previous study. Soil ΔC stocks (ΔC refers to the difference in SOC content between a poplar plantation and the paired cropland) in bulk soil and light fraction were positively correlated with stand basal area (R (2) = 0.48, p<0.01 and R (2) = 0.40, p = 0.02, respectively), but not for the heavy fraction. SOCcrop (SOC derived from crops) contents in the light and heavy fractions in poplar plantations were significantly lower as compared with SOC contents in croplands, but tree-derived C in bulk soil, light and heavy fraction pools increased gradually with increasing stand basal area after afforestation. Our study indicated that cropland afforestation could sequester new C derived from trees into surface mineral soil, but did not enhance the stability of SOC due to a fast turnover of SOC in this semi-arid region. </AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Hu</LastName><ForeName>Ya-Lin</ForeName><Initials>YL</Initials><AffiliationInfo><Affiliation>State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, People's Republic of China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Hu</LastName><ForeName>Li-Le</ForeName><Initials>LL</Initials><AffiliationInfo><Affiliation>Chinese Research Academy of Environmental Sciences, Beijing, People's Republic of China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Zeng</LastName><ForeName>De-Hui</ForeName><Initials>DH</Initials><AffiliationInfo><Affiliation>State Key Laboratory of Forest and Soil Ecology, 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MajorTopicYN="N">Agriculture</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D002244" MajorTopicYN="N">Carbon</DescriptorName><QualifierName UI="Q000032" MajorTopicYN="N">analysis</QualifierName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D002681" MajorTopicYN="N">China</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018556" MajorTopicYN="N">Crops, Agricultural</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D017753" MajorTopicYN="N">Ecosystem</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D016468" MajorTopicYN="Y">Forestry</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000254" MajorTopicYN="Y">growth & development</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012987" 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IdType="pii">PONE-D-13-36105</ArticleId><ArticleId IdType="pmc">PMC3900571</ArticleId></ArticleIdList><ReferenceList><Reference><Citation>Nature. 2002 Aug 8;418(6898):623-6</Citation><ArticleIdList><ArticleId IdType="pubmed">12167857</ArticleId></ArticleIdList></Reference><Reference><Citation>Science. 2004 Jun 11;304(5677):1623-7</Citation><ArticleIdList><ArticleId IdType="pubmed">15192216</ArticleId></ArticleIdList></Reference><Reference><Citation>New Phytol. 2012 Jul;195(1):172-81</Citation><ArticleIdList><ArticleId IdType="pubmed">22512731</ArticleId></ArticleIdList></Reference><Reference><Citation>Tree Physiol. 2007 Oct;27(10):1493-504</Citation><ArticleIdList><ArticleId IdType="pubmed">17669739</ArticleId></ArticleIdList></Reference><Reference><Citation>PLoS One. 2012;7(3):e32054</Citation><ArticleIdList><ArticleId IdType="pubmed">22412854</ArticleId></ArticleIdList></Reference><Reference><Citation>Environ Manage. 2004 Apr;33(4):528-44</Citation><ArticleIdList><ArticleId IdType="pubmed">15453406</ArticleId></ArticleIdList></Reference></ReferenceList></PubmedData></pubmed><affiliations><list><country><li>République populaire de Chine</li></country><settlement><li>Pékin</li></settlement></list><tree><country name="République populaire de Chine"><noRegion><name sortKey="Hu, Ya Lin" sort="Hu, Ya Lin" uniqKey="Hu Y" first="Ya-Lin" last="Hu">Ya-Lin Hu</name></noRegion><name sortKey="Hu, Li Le" sort="Hu, Li Le" uniqKey="Hu L" first="Li-Le" last="Hu">Li-Le Hu</name><name sortKey="Zeng, De Hui" sort="Zeng, De Hui" uniqKey="Zeng D" first="De-Hui" last="Zeng">De-Hui Zeng</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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